HPCC-9646 Compile warning in thorsoapcall.cpp

DBGLOG statement specified %ld when the variable type is unsigned.
Changed %ld to %d

Signed-off-by: William Whitehead <william.whitehead@lexisnexis.com>
Merge branch 'soapcall' into candidate-4.0.0

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>